fac86ac7b3 scripted-diff: Add missed copyright headers (Hennadii Stepanov)
6fde9d5e47 script: Update EXLUDE list in copyright_header.py (Hennadii Stepanov)
1998152f15 script: Add empty line after C++ copyright (Hennadii Stepanov)
071f2fc204 script: Add ability to insert copyright to *.sh (Hennadii Stepanov)
Pull request description:
This PR improves `contrib/devtools/copyright_header.py` script and adds copyright headers to the files in `src` and `test` directories with two exceptions:
- [`src/reverse_iterator.h`](https://github.com/bitcoin/bitcoin/blob/master/src/reverse_iterator.h) (added to exceptions)
- [`src/test/fuzz/FuzzedDataProvider.h`](https://github.com/bitcoin/bitcoin/blob/master/src/test/fuzz/FuzzedDataProvider.h) (added to exceptions)
On master 5622d8f315:
```
$ ./contrib/devtools/copyright_header.py report . | grep zero
25 with zero copyrights
```
With this PR:
```
$ ./contrib/devtools/copyright_header.py report . | grep zero
2 with zero copyrights
```
~I am uncertain about our copyright policy with `build_msvc` and `contrib` directories content, so they are out of scope of this PR.~
ACKs for top commit:
MarcoFalke:
ACK fac86ac7b3
Tree-SHA512: d7832c4a7a1a3b7806119775b40ec35d7982f49ff0e6199b8cee4c0e0a36e68d51728b6ee9924b1c161df4bc6105bd93391b79d42914357fa522f499cb113fa8
95ca6aeec7